incb039110 and Psoriasis

Several classes of new oral therapy are in use or in development for the treatment of psoriasis. Despite the high efficacy of biologics, new oral therapies remain important as patients generally prefer this mode of administration and they offer an alternative risk-benefit profile. In this review, we discuss the novel modes of action of these drugs, including modulation of cellular pathways involving diverse targets such as Janus kinase, phosphodiesterase 4, sphingosine 1-phosphate, A3 adenosine receptor and rho-associated kinase 2. We review the available evidence around licensed drugs (apremilast) and drugs that are advanced (tofacitinib) or early (ponesimod, baricitinib, peficitinib, INCB039110, CF101, KD025) in the development pipeline. The key limitations of these oral therapies are their modest efficacy profile (apremilast, ponesimod) and the limitations of their safety profile (tofacitinib, ponesimod), while the evidence for the early pipeline drugs are at phase II level only. Potential niches of current unmet needs include apremilast for patients with concomitant psoriatic arthritis, as combination treatments with biologic therapies, and/or for patients in whom multiple biologic therapies have failed due to immunogenicity and secondary inefficacy. The present knowledge gap regarding these novel drugs includes the need for longer clinical trials or observational studies to evaluate safety, and randomised phase III trials for the early pipeline drugs. We conclude that further research and data are necessary to conclusively establish the role of these agents in the current psoriasis treatment paradigm.

Topics: Adamantane; Adenosine; Adenosine A3 Receptor Antagonists; Administration, Oral; Arthritis, Psoriatic; Azetidines; Biological Factors; Biological Therapy; Clinical Trials as Topic; Humans; Isonicotinic Acids; Janus Kinases; Niacinamide; Phosphodiesterase 4 Inhibitors; Piperidines; Protein Kinase Inhibitors; Psoriasis; Purines; Pyrazoles; Pyrimidines; Pyrroles; Receptors, Lysosphingolipid; rho-Associated Kinases; Sulfonamides; Thalidomide; Thiazoles

Chronic plaque psoriasis is partially mediated by elevation of proinflammatory cytokines, including several within the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway.. To evaluate the safety and efficacy of the oral selective JAK1 inhibitor INCB039110 in stable, chronic plaque psoriasis.. This was a phase 2, randomized, double-blind, placebo-controlled, dose-escalation study of INCB039110 (100 mg once daily, 200 mg once daily, 200 mg twice daily and 600 mg once daily) for 28 days. The primary endpoint was mean percent change from baseline in the static Physician Global Assessment (sPGA) at day 28. The protocol was institutional review board approved.. Of 50 patients, 48 completed the study. At day 28, mean percent reduction from baseline in sPGA was 22.2% for INCB039110 100 mg once daily (p  =  0.270 vs. placebo), 29.4% for 200 mg once daily (p  =  0.118), 35.2% for 200 mg twice daily (p  =  0.053), 42.4% for 600 mg once daily (p  =  0.003) and 12.5% for placebo. Across groups, 11.1% to 45.5% achieved an sPGA score of 1 versus 0% for placebo. INCB039110 was generally well tolerated; the most common treatment-emergent adverse event was nasopharyngitis (18.4%).. INCB039110 produced significant improvements in sPGA, demonstrating proof of concept in chronic plaque psoriasis.

Topics: Adult; Aged; Azetidines; Dose-Response Relationship, Drug; Double-Blind Method; Female; Humans; Isonicotinic Acids; Janus Kinase 1; Male; Middle Aged; Psoriasis; Treatment Outcome